Communication control method, user equipment, network server, and system

A communication control method, comprising:

• sending, by a second user equipment, a first message to a first user equipment,
• wherein the first message comprises power parameter information of the second user equipment,
• wherein the power parameter information of the second user equipment is at least one of a transmit power range or a power class of the second user equipment,
• wherein the power parameter information is used to obtain a path loss by performing a calculation according a maximum transmit power value of the second user equipment and the receive power of the first message,
• wherein the maximum transmit power value is based on the power parameter information, and
• wherein the power parameter information is used to determine, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment.

A user equipment, wherein the user equipment performs communication with a second user equipment, the user equipment comprising:

• a receiver configured to receive a first message sent by the second user equipment;
• and
• a processor coupled to the receiver and configured to:
• acquire a receive power of the first message;
• acquire power parameter information of the second user equipment, wherein the power parameter information of the second user equipment is at least one of a transmit power range or a power class of the second user equipment;
• obtain a path loss value by performing a calculation according a maximum transmit power value of the second user equipment and the receive power of the first message, wherein the maximum transmit power value is based on the power parameter information;
• and
• determine, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment.